Repeater for quadruplex telegraphs



(No Model.)

. G. W. GARDANIER.

REPEATBR FOR QUADRUPLEX TELEGRAPHS. No. 326,637. Patented Sept. 22, 1885.

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UNITE STATES I PATENT rricn.

GEORGE \V. GARDANIER, OF NEWV YORK, N. Y., ASSIGNOR TO THE BALTIMORE & OHIO TELEGRAPH COMPANY, OF BALTIMORE, MARYLAND.

REPEATER FOR QUADRUPLEX TELEGRAPHS.

SPECIFICATION forming part of Letters Patent No. 326,637, dated September 22,1885.

Application filed January 14, 1885.

To all whom, it may concern.-

Be it known that I, GEORGE W. GARDANIER, a citizen of the United States, residing in New York, in the county and State of New York, have invented certain new and useful Improvements in Telegraphic Repeaters, of which the following is a specification.

My invention relates to an organization of apparatus for repeating from one receiving instrument upon an independent circuit the telegraphic communications received through that instrument without impeding the operation of the same.

The object oftheinvention is to provide convenient and efficient means adapted to be used in connection with one of the receiving-instruments of a quadruplex or a duplex telegraph system for operating an auxiliary sys tem, whereby the messages received upon one of the instruments may be retransmitted over another circuit, while at the same time the independent circuit or auxiliary system may itself be operated independently of the quadruplex system.

The invention consists, generally, in applying to one of the instruments of a quadruplex system a circuitcontrolling device, whereby an electric circuit may be opened and closed by the operation of that instrument. In this circuit there is included an electro-magnet, the armature of which responds to the movements of the armature of the receiving-instrument. This armature is equipped with a continuity-preserving lever or transmitter. The working contact-point of this transmitter is connected with one pole of a battery, to the other pole of which is connected the conductor constituting the independent circuit or auxiliary system upon which the message is to be repeated. The contact-spring is connected with the earth, preferably through an electromagnet which is applied to a second transmitter or pole-changing key for transmitting upon an independent circuit. This last-named 5 transmitter may be employed, when it is so desired, independently of the remaining parts of the apparatus, and for this purpose a local battery is included in a portion of the conductor leading to the earth from the repeating- 50 transmitter applied to the auxiliary system. A switch is employed for disconnecting this (No model.)

conductor, and thus the battery, from the contact-spring of the repeating-transmitter and forming an independent local circuit, whereby the second transmitter may be operated for transmitting upon its independent circuit. A Morse key is also included in the independent local circuit thus formed, and this may be employed for operating the second transmitter. Means are also employed for establishing such local connections that the connections of the auxiliary line may be made and interrupted by the Morse key, thus transmitting upon the auxiliary system independently of the mainline instrument.

The accompanying drawing is a diagram illustrating the general organization of appa ratus employed for carrying out my invention.

Referring to the drawing, A represents one of the receiving relay-instruments of a duplex or quadruplex telegraphic system. In this instance it is shown as being employed for actuating a receiving-instrument or sounder, B, by means of currents from a local battery, 0'. The battery 0 has one pole connected with the armature of the relay A, and its other pole connected through the coils of the electro magnet with one of the stops of the same, the front or the back contact-stop, according to the organization of the apparatus.

The armature-lever b of the receiving-instrument B is employed for producing sounds in the usual manner for giving Morse or other signals. \Vithout interfering with its usefulness for this purpose, the connections of a local battery, 0", may be completed through the armature-lever and its contact-stop b". For this purpose one pole of the battery 0 is connected by a conductor, 3, with the armature -lever. The front stop, b, of the lever is connected by a conductor, 4., through the coils of an electromagnet, O, with the other pole of the battery 0. The electro-magnet G is employed for operating a repeating-transmitter, O. For this purpose the armaturelever c is provided with an insulated'spring, '0 which, when the lever is away from its magnet, rests against a stop, a, formed upon the end of the lever. \Vhen the electro-magnet Ois vitalized, it attracts its armature, and the spring 0 is brought against the fixed stop 0, making electrical contact therewith, and at the same time breaking thecontact with the stop a This portion of the apparatus is employed for automatically repeating into the branch line L the messages received upon the receivinginstrument B. A battery, 0, is included in the circuit of the line L, one pole of the same being connected with the line and the other with the stop 0. Each ti me, therefore, the armature-lever is actuated by the electro-magnet O the main line L will be connected through the stop with the spring 0 This spring is connected by conductors 5 and 6, through the coils of an electro -magnet, D, and with the earth, at G,'by conductors 7 and 8. The connections between the conductors 7 and 8 are normally complete through a switch-lever, S, and its contactpoint 8. A conductor, 10, leads from the switch-point s to the lever c, for a pur pose which will hereinafter appear.

The electro-magnet D is employed for a purpose which will also be hereinafter described,while the conductors 5, 6, 7,a11d 8 serve to afford an earth-connection for the branch line L and the battery 0 when the lever c is actuated. Each time, therefore, that the electro-magnet C is vitalized a current will be sent to the line L. These currents or impulses it is evident will correspond to the movements of:

the receiving-instrument B, and whatever:

messages are received by this instrument will be thus retransmitted upon the line L.

from the station at which theinstrument O is located independently of the quadruplex sys-item,a key, K, is included in the conductor 7, and this key may be operated to-open and close the earth-connections of the battery O, provided the transmitter G be at rest with the lever 0 toward its electro-magnet O. The

switch S is, however,'then turned from the point 8, thus leaving the connections between the conductors 7 and 8 open,except when the key K is depressed, Signals may thus be readily transmitted upon the line L. manner signals may be transmitted from the; distant terminal of theline L by simply conr;

pleting and interrupting the circuit at that station, and the impulses thus sent will act upon the electro-magnet D, which may be@ employed either as a sounder or as a relay or as atransmitter for an independent circuit.

It is evident that if a repeating-transmitted be applied to the electro-magnet D, as shown; at D, it will be desirable that this shall notrespond to the operations of the instrument 0 when it is' not desired to transmit upon a second branch circuit. For this reason it is .designed to maintain the circuit of a battery;

0 complete through the electro magnet,

whether the lever c be in one or the'other of its positions. For this purpose the battery 0 is included in the conductor 6 together with;

the electro-magnet D, and the conductor l0, beforereferred to, is connected with the arma-. ture-lever c. When, therefore, the transmitting-lever c is toward its electro-magnet, the clectro-magnet D will be vitalized by vir-- Inlike tue of the currents from both the batteries 0 and 0. When, however, the armature-lever c is away from its electro-magnet, and the switch-lever S is in contact with its point 8. the circuit of the battery 0 will be completed from one pole through the conductors 6 and 5, the spring 0*, stop 0 and lever 0 to the con ductor 10, thence through the switch-point s, the lever S, conductor 7,'and the coils of the electro-magnet D to the remaining pole, so that the electro magnet D will remain vitalized and no effect will be apparent upon the armature.

When it is desired to employ the transmitter D independently of the other portions of the apparatus, a switch, E, is employed. This switch is interposed between the conductors 5 and 6, and may be moved from a point, e, constituting the terminal of the conductor5 to a point, 0 in the conductor 10, thereby completing a local circuit for the battery 0, and this circuit may be made andinterrupted by the key K, the switch S being moved away from its point 8.

; said line is connected, a contact-spring to which As it may be desired at times to transmit:

said stop is applied, means for causing said spring to be moved into and out of contact with said stop, a conductor constituting an earth-connection for said spring, a battery and an electro-magnet included in said conductor, a second contact-stop against which said contact-spring rests when not in contact with the first-named contact-stop, and a conductor connecting the second contact-stop with the earth.

2. The combination, substantially as hereinbefore set forth, with a receiving-instrument of a duplex or quadruplex telegraph system, ofa branch line, a battery included therein, a

contact-stop with which said branch line is connected, a contact-spring to which said contact is applied means for causing said spring to be movedinto and out of contact with said stop in unison with the movements of said receivbranch line with the earth and disconnecting it therefrom, an electro-magnet through which the connections of said battery are thereby completed and interrupted, a second battery, and means, substantially such as described, for maintaining the connections of said second battery complete through said electromagnet when the first-named battery-connections are being made and interrupted.

T ing-instrument and thereby connecting said 3. The combination, substantially as hereinbefore set forth, with one of the receivinginstruments of a duplex or quadruplex telegraph system, of an independent line, a transmitter for the same operated by the movements of said receiving-instrument, a battery, the connections of which with said independcut line are normally controlled by said transmitter, and an independent key for controlling the connections of said battery, substantially as described, when said transmitter is at rest.

4. The combination, substantially as hereinbefore set forth, with one of the receiving- -instruments of a duplex or quadruplex telegraph system, of an independent line, atransmitter for the same, a battery, the connections of which through said independent line are controlled by said transmitter, an electromagnet included inthe circuit of the same, a second battery, the connections of which are GEORGE \V. GARDANIER.

\Vitnesses:

DANL. XV. EDGEOOMB, CHARLES A. TERRY. 

